The new ruse features a fake Firefox "Just Updated" page of the type that is displayed just after users update their browser software, a regular occurrence of late. The page claims that users need to get a Flash update, and produces a download dialogue box with a scareware payload. The attack kicks in once surfers visit a maliciously constructed website and is not associated with genuine Firefox updates from Mozilla, which simply serve as a theme for the attack.

F-Secure, which was among the first anti-virus firms to detect the site, has a write-up of the scareware slinging ruse in a blog post here.

In related news, McAfee warned earlier this week that VXers were offering a Trojan disguised as trial versions of its VirusScan anti-virus software. New variants of the Bredolab Trojan were attached to spam emails, it warns. ®